After reading the threads above about turning my 3 circuit to a 2 circuit, I started collecting parts and tools to do this. On all 3 circuits are you supposed to see the tube protruding behind the primary and secondary main jets? I cannot see any tubes at all....does this mean I have a 2 circuit already or was there some sort of change Holley did at some point?

I bought a pair of QFT 3 EB blocks and wondered where a good baseline would be for my combo. The majority of the info I read was for 4 or 5 hole blocks and only a small glimpse of 3 holers. My McMaster/Carr stuff showed up but I am still waiting on the hole gauges.